---
title: "GIA: meaning in gemology"
description: "GIA, the Gemological Institute of America, is a public benefit, nonprofit institute established in 1931. It works in gem research, education and laboratory…"
url: https://digitalgemology.com/learn/glossary/gia
image: https://digitalgemology.com/img/og-digital-gemology.png?v=d224fb01
---

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[Glossary](https://digitalgemology.com/learn/glossary) · Grading report

# GIA

Also called Gemological Institute of America

GIA, the Gemological Institute of America, is a public benefit, nonprofit institute established in 1931. It works in gem research, education and laboratory grading.

## In more detail

GIA established the 4Cs and the International Diamond Grading System. It runs laboratories and schools in several countries. It publishes the scientific journal Gems & Gemology. Its laboratory is a member of the LMHC, the group that standardizes colored stone report wording.

## Related terms

- [Four Cs](https://digitalgemology.com/learn/glossary/four-cs): The four Cs are color, clarity, cut and carat weight: four scales that describe the quality of a diamond. GIA made them into a grading system in the 1950s.
- [Diamond grading report](https://digitalgemology.com/learn/glossary/diamond-grading-report): A diamond grading report is an independent lab's record of what a stone is and how it grades. It is true for the day the lab examined the stone.
- [Report Check](https://digitalgemology.com/learn/glossary/report-check): Report Check is GIA's online database. Enter a report number to see what GIA itself recorded; IGI's equivalent is Verify Your Report.
- [Cut grade](https://digitalgemology.com/learn/glossary/cut-grade): The cut grade rates how well a diamond's proportions and finish work, from Excellent to Poor. GIA gives it only to standard round brilliants in the D-to-Z color range.
- [Colored stone report](https://digitalgemology.com/learn/glossary/colored-stone-report): A colored stone report is a lab document that identifies a gem and states any treatment the lab detects. GIA's identification report describes the color but does not grade it.

## Learn more

- [How to read a diamond grading report](https://digitalgemology.com/learn/grading-reports)

[All 369 terms](https://digitalgemology.com/learn/glossary)